Did you pay the rent or any bills?
With UKVI, it's all about Mail/post.
I didn't pay any bills. Hm....sorry to trouble you, but do you think the below list might suffice? We lived together from September-January.
1. Council Tax bill that states when I first moved into my fiance's house (owned by him) in September (and lists me as a significant other).
2. My internship contract from September- January that lists my name and address (fiance's address).
3. A few bank statements (October, November) that state my name and address (fiance's address) for that period.
4. Payslips that state my name and address (fiance's address) for that period.
Thank you for your time!